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4434Touch Mathematics
http://www.merlot.org/merlot/viewMaterial.htm?id=907264
This site hosts two pages of dynamic geometric animations of common functions.The first page, Derivatives, features functions such as the natural logarithm, the exponential function, f(x)=sin(x), etc, and displays graphs of their first and second derivatives. As the user traces along each graph, a tangent line is displayed at that x value for each of the three graphs. The second page, Trigonometry, displays side-by-side, unit circle and rectangular coordinate graphs, complete with all six trigonometric functions. Each function is displayed on both graphs, is color coded, and can be toggled on and off to better show specific relationships between functions. The user can also click to freeze tracer points at any angle 0 ≤ θ ≤ 2π.These visualizations give insight into the dynamic nature of various common functions and help users to percieve their fundamental geometric properties and relationships.Ratey the Math Cat
http://www.merlot.org/merlot/viewMaterial.htm?id=794325
Ratey pops up when you least expect him. And he can't resist pointing out the rates and "purrportions" in daily life. It turns out that a lot of everyday decisions rely on mathematical reasoning about rates.Ratey the Math Cat supports students in understanding and using ratios and proportions to represent quantitative relationships, building new mathematical knowledge through problem solving, and solving problems that arise in mathematics and in other contexts.Atlantean Dodgeball
http://www.merlot.org/merlot/viewMaterial.htm?id=794360
Ratio errors confuse one of the coaches as two teams face off in an epic dodgeball tournament. See how mathematical techniques such as tables, graphs, measurements and equations help to find the missing part of a proportion. Atlantean Dodgeball addresses number and operations standards, the algebra standard, and the process standard, as established by the National Council of Teachers of Mathematics (NCTM). It guides students in: Understanding and using ratios and proportions to represent quantitative relationships. Relating and comparing different forms of representation for a relationship. Developing, analyzing, and explaining methods for solving problems involving proportions, such as scaling and finding equivalent ratios. Representing, analyzing, and generalizing a variety of patterns with tables, graphs, words, and, when possible, symbolic rules. Bad Date
http://www.merlot.org/merlot/viewMaterial.htm?id=794364
What do you do when someone asks if you listen to country music backwards, but won't give you the chance to answer? In this humorous animation, the ratio of words spoken by each partner predicts whether a date goes well or horribly.Bad Date addresses number and operations standards and the process standard. It guides students in understanding and using ratios and proportions to represent quantitative relationships, in developing, analyzing, and explaining methods for solving problems involving proportions, such as scaling and finding equivalent ratios, and in solving mathematical problems in context.Number Rights
http://www.merlot.org/merlot/viewMaterial.htm?id=794367
Whole numbers are no better than any others! Practice plotting values on the number line as a passionate activist rises up and demands equity for all numbers, including fractions and decimals.Number Rights addresses number and operations standards as well as the process standard, as established by the National Council of Teachers of Mathematics (NCTM). It supports students in comparing and ordering fractions, decimals, and percents efficiently and finding their approximate locations on a number line.Overrulled!
http://www.merlot.org/merlot/viewMaterial.htm?id=794369
Two besotted rulers must embrace proportional units in order to complete a bridge to unite their lands. It takes mathematical reasoning to deduce the problem, and solution, when engineers from Queentopia and Kingopolis try to build a bridge that meets in the middle of the river.Overruled! guides students in developing, analyzing, and explaining methods for solving problems involving proportions, such as scaling and finding equivalent ratios and solving problems that arise in mathematics and in other contexts and in representing, analyzing, and generalizing a variety of patterns with tables, graphs, words, and symbolic rules.Scale Ella
http://www.merlot.org/merlot/viewMaterial.htm?id=794378
The evil Scaleo has escaped from prison and is transforming the length, width, and height of objects until they become useless... or dangerous.Who can put things right? Our super heroine, Scale Ella, uses the power of scale factor to foil the villain.Scale Ella guides students in using factors, multiples, prime factorization, and relatively prime numbers to solve problems; developing, analyzing, and explaining methods for solving problems involving proportions, such as scaling and finding equivalent ratios; and using factors, multiples, prime factorization, and relatively prime numbers to solve problems.Ratey the Math Cat
http://www.merlot.org/merlot/viewMaterial.htm?id=794389
Ratey the Math Cat supports students in understanding and using ratios and proportions to represent quantitative relationships, building new mathematical knowledge through problem solving, and solving problems that arise in mathematics and in other contexts.Basic Math Videos
http://www.merlot.org/merlot/viewMaterial.htm?id=738773
This collection of videos includes brief explanations of concepts of whole number, fractions, and decimals.Base 2 binary multiplication - basic
http://www.merlot.org/merlot/viewMaterial.htm?id=731266
Multiplies two small numbers (bytes) in binary form by simulating the physical repetition of the multiplicand, driven by the place-value digits of the multiplier.